<!DOCTYPE html>
<html>

<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <style>
        ul {
            list-style: none
        }
        
        * {
            margin: 0;
            padding: 0;
        }
        
        div {
            width: 1150px;
            height: 400px;
            margin: 50px auto;
            border: 1px solid red;
            overflow: hidden;
        }
        
        div li {
            width: 240px;
            height: 400px;
            float: left;
        }
        
        div ul {
            width: 1300px;
        }
    </style>
</head>

<body>
    <div id="box">
        <ul>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
        </ul>
    </div>
</body>

</html>